▎ 摘　　要

NOVELTY - A vanadium-doped titania/graphene electrocatalyst is prepared by dissolving vanadium pentoxide in hot sulfuric acid at 45-60 degrees C, stirring, adjusting pH value, adding tetrabutyl titanate, stirring to obtain vanadium-doped titania precursor, oil bath heating, washing solid product, filtering, vacuum drying to obtain vanadium-doped titania, taking copper sheet, performing ultrasonic treatment with ethanol and deionized water, drying, placing in a quartz boat, calcining under nitrogen atmosphere, passing methane, cooling in a flowing nitrogen atmosphere to obtain graphene deposited on the copper foil, separating graphene from the copper foil, dispersing graphene in absolute ethanol, adding vanadium-doped titania, performing ultrasonic dispersion for 20 minutes, stirring, repeating steps, drying, air-drying, passing nitrogen for pre-sintering, sintering under hydrogen gas atmosphere, cooling to room temperature, taking out, and grinding. USE - The method for preparing vanadium-doped titania/graphene electrocatalyst used for electrochemical nitrogen reduction (claimed). ADVANTAGE - The vanadium-doped titania/graphene electrocatalyst has excellent ammonia-producing performance in the electrochemical reduction of nitrogen-producing ammonia test, and has a higher ammonia yield. DETAILED DESCRIPTION - A vanadium-doped titania/graphene electrocatalyst is prepared by dissolving vanadium pentoxide in hot sulfuric acid at 45-60 degrees C, stirring, adjusting pH value to 1-2, adding tetrabutyl titanate, stirring to obtain vanadium-doped titania precursor, oil bath heating, washing solid product, filtering, vacuum drying to obtain vanadium-doped titania, taking 1 cm2 copper sheet, performing ultrasonic treatment with ethanol and deionized water, drying, placing in a quartz boat, calcining under nitrogen atmosphere, passing methane for 30 minutes, cooling in a flowing nitrogen atmosphere to obtain graphene deposited on the copper foil, separating graphene from the copper foil, dispersing graphene in absolute ethanol, adding vanadium-doped titania, performing ultrasonic dispersion for 20 minutes, stirring for 1 hour, repeating steps 1-3 times, drying, air-drying at 200 degrees C for 0.5-1 hour, passing nitrogen for 20-30 minutes for pre-sintering, sintering under hydrogen gas atmosphere, cooling to room temperature, taking out, and grinding.